Broken handset

<p> </p> <p>I have a vodacom contract which i app**** for through autopage. I had it for a month when i took my phone in fir tge first time. I was unable to make phobecalls because nonone seemed to hear me when i phoned them. Two months later it came back. Still broken. After autopage closed down i was informed that all queries can be taken to vodacom. I went there abd once again they send my phone away. This time it only took two weeks but it came back still broken. Only this time it had a crack in the screen. Now, no matter who i turn to for assistance no one is taking responsibility and the only answer i ever get is it has to be sent away. I am paying my bill every month. All i ask is for a new working handset or if that can't be done to cancel the contract. But once again. Everybody just says it's not their problem. Please help me</p>